Study of the Basic Kinetics of Decomposition of MMH and MHF and the Effects of Impurities on their Stability.
Quarterly rept. no. 4, 16 Mar-15 Jun 70,
STANFORD RESEARCH INST MENLO PARK CA
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The reactions of MMH Monomethylhydrazine with oxygen, soluble metal ions and methyl radicals have been studied. The reaction between MMH and oxygen in the gas phase has been studied in three separate experiments. The results clearly indicate that at room temperature the reaction is stoichiometric and that CH3NNH is the initial product. The reaction is complete in a manner of minutes. At 319C, in an experiment in which the initial O2MMH ratio was 16, all of the MMH disappeared with a surprisingly large quantity of hydrogen as a product. A chain-type process, possibly explosive, is implicated here. Experiments were performed in which soluble metal ions were in solutions with MMH in the ratio MMHion901. The decomposition of MMH in the presence of FeIII, FeII, CuII, NiII, ZnII, MnII, and MgII is immeasurably slow at room temperature. At 319C, however, MMH decomposition is total for the first four ions within three hours. The iron and nickel ions are reduced to the native metals. The introduction of methyl radicals into a sample of MMH at 319C does not initiate long chain reactions, but rather results in a stoichiometric 11 decomposition of the material. Author
- Physical Chemistry
- Liquid Rocket Propellants